Carbureter.



A. C. STEWART.

OARBURETER.

APPLICATION FILED FEB.27, 1911.

Patented Jan. 7, 1913.

ALFRED C. STEWART, 0F LOS ANGELSfCALIFORNIA.

CARBURETER.

Specification of Letters Patent.

Patented Jan. 7, 19.13.

Application led February 27, 1911. Serial No. 611,288,

To lZZfwz-om t may concern;

Be it known thatI, ALFRED C. STEWART, a citizen of the United States, residing at Los Angeles, 'in the county of Los Angeles and State of California, have invented a new and useful Carbureter for Use with Heavy Fuels, of which the following is a specification.

This invention relates to a carbureter adapted for forming an explosive or combustible mixture Vof air and vapor of oil or liquid fuel, and the main object of the invention is to provide means whereby oil or liquid fuel may be used which is comparatively heavy, so t-hat it does not vaporize readily at the usual temperatures existing in a carbureter. lVhen distillate or similar heavy fuels areused in acarbureter, a con siderable proportion of the oilor liquid fuel which is taken up with the air in passing through the carbureter is dropped or redeposited in its passage to the cylinder of the engine, so that a portion of the fuel is not effective in the combustion, and the objectionable clogging of the passages and lack of uniformity of mixture are produced.

An important object of the present inven-v tion is'to insure that all of the oil which is furnished to the carbureter willreach the inlet of the engine in vaporized condition. For this purpose auxiliary or supplementary heat-ing means are provided, supplying to the oil a sufficient quantity of heat to insure its vaporization.

Other objects of the invention will appear hereinafter.

The accompanying drawings illustrate the invention, and referring thereto: Figure 1 1s a vertical section of the carbureter and of the supplementary heating means with the adjacent parts of an engine in elevation. Fig. 2 is a vertical section of the carbureter showing a modified form of heating means.

The carbureter shown in the drawing comprises a device for admitting a definite quantity of oil and air to the intake of an engine. y having an air inlet 2, an outlet 4 for caslng 1 having' a throttle -valve 3 and communicat-- ing with the inlet or inductionjpipe or manifold 5 of van engine 6, a valve member 7 mounted within the casing 1 to move in response to the suction from the'inlet 2 to the This device comprises acasing 1v outlet means 4, and oil supply means controlled by the movement of saidvalve member 7, and controlling admission of oil to the air drawn through the pipe 4. Said oil supply means comprises an oil chamber 8, a well or oil receptacle 9 communicating by opening 10 with the interior of the oil chamber 8 below the oil level therein, a pipe or communicating means 11 opening into the well or recept-acle 9 and extending into the communicating means between the outlet means 4 and the engine, for example, in the manifold 5, and a valve 13 controlling communication between the oil chamber and the chamber 9, said valve working in opening 1() aforesaid, and being operated automatically with a notch in the stem 7 of the valve 7 said lever being connected to the valve 13" by a rod 14. Said rod may be provided with a turn-buckle 15 for adjusting` its length so as to regulate the amountof openinglof the valve. y

Means are provided for maintaining a definite level, of oil in the oil chamber 8, said means consisting, for example, of a supply pipe 17 communicating with said chamber, a valve 18 controlling such communication, a spring 19 tending to hold said valve closed and afloat 20 engaginga stem 18 on said valve to open said valve when the oil falls below a definite level.

The pipe or communicating means 11 extending from the oil receptacle 9 to the intake of the engine is provided with means for supplying heat at a portion thereof, such portion indicated at 21 being bent to give a greater length, and extending within suit-v able heating means, for example, the exhaust pipe or manifold 23 of the engine.

In operation, 'the suctionof th-e engine causes the valve 7 to lift, the throttle 3 being open so that air may pass beneath said valve 7 and lifting said valve to allow air to pass around the valve into the outlet 4 leading to the intake of the engine. This operation of the valve 7 operates the oil controlling valve 13 allowing a definite `quantity of oil to pass into the receptacle 9. In

the suction of the engine the condition of suction resulting in the intake or inlet means municating means 11. As the oil is so drawn ,up through said pipe or communicating means llf-it passes through the heating portion 21 thereof and is thereby vaporized, the amount of heat furnished to the oil being suiicient to convertall of the oil into vapor before it passes into the engine cylinder.

Instead of utilizing the exhaust from the engine, as shown in Fig. 1, any other` suit;-

able heating means may be used for supplying the necessary quantity of heat to the oil,

for example, as shown in Fig. 2, the oil su ply pipe 11 leading from the oil receptac e 91 to the intake or inlet means 5 of the engine is surrounded by a casing or chimney 25 for directing the hot gases or products of combustion from the burner 26 in heating contact with the pipe 11. The construction may be otherwise as above described.,

What I claim is:

The combination of an oil chamber, an oil accumulating chamber communicating with I the outer air and With said oil chamber, a, 3o

Valve-for restricting the connection bet-Ween said chambers, an inlet means for an internal combustion engine an air inlet means,

an air valve controlling communication from said air inlet to the engine lnlet means, means for operatlng said Valves 1n correspondence, oil communicating means leading from said oil accumulating chamber to the engine inlet means, and means for heating said oil communicating means.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 17 day of February,y 1911.

ALFRED o.I STEWART.

In presence of- ARTHUR P. KNIGHT, F. A. CRANDAnL. 

